what is the surd of these two right angled triangles

Answer:
To find a we Pythagoras theorem
That's
[tex] {a}^{2} = {6}^{2} + {11}^{2} \\ {a}^{2} = 36 + 121 \\ \\ {a}^{2} = 157 \\ \\ a = \sqrt{157} \\ [/tex]
[tex] {11}^{2} = {b}^{2} + {6}^{2} \\ \\ {b}^{2} = 121 - 36 \\ \\ {b}^{2} = 85 \\ \\ \\ b = \sqrt{85} [/tex]
Hope this helps you
Answer:
Below in bold.
Step-by-step explanation:
The first one a^2 = 6^2 + 11^2 ( By the Pythagoras Theorem)
a^2 = 157
a = √157.
The second triangle:
b^2 = 11^2 - 6^2
b^2 = 85
b = √85.